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Classe Task

Defines an abstract class that implements the methods and properties common to all tasks in Integration Services. 

Gerarchia di ereditarietà

System.Object
  Microsoft.SqlServer.Dts.Runtime.DtsObject
    Microsoft.SqlServer.Dts.Runtime.Task
      Altro...

Spazio dei nomi  Microsoft.SqlServer.Dts.Runtime
Assembly:  Microsoft.SqlServer.ManagedDTS (in Microsoft.SqlServer.ManagedDTS.dll)

Sintassi

'Dichiarazione
Public MustInherit Class Task _
    Inherits DtsObject _
    Implements IDTSManagedTask
'Utilizzo
Dim instance As Task
public abstract class Task : DtsObject, 
    IDTSManagedTask
public ref class Task abstract : public DtsObject, 
    IDTSManagedTask
[<AbstractClassAttribute>]
type Task =  
    class 
        inherit DtsObject 
        interface IDTSManagedTask 
    end
public abstract class Task extends DtsObject implements IDTSManagedTask

Nel tipo Task sono esposti i membri seguenti.

Costruttori

  Nome Descrizione
Metodo protetto Task Initializes a new instance of the Task class.

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Proprietà

  Nome Descrizione
Proprietà pubblica ExecutionValue Returns a user-defined object. This field is read-only.
Proprietà pubblica Version *** Member deprecated; see Remarks. ***    Returns the version of the task. This property is read-only.

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Metodi

  Nome Descrizione
Metodo pubblico CanUpdate *** Member deprecated; see Remarks. ***    A Boolean that indicates whether the new package XML can update the old package XML.
Metodo pubblico Equals Determines whether two object instances are equal. Ereditato da DtsObject.
Metodo pubblico Execute Runs the task.
Metodo protetto Finalize Ereditato da Object.
Metodo pubblico GetConnectionID Gets a String containing the ID of the connection.
Metodo pubblico GetConnectionName Gets a String containing the name of the connection.
Metodo pubblico GetHashCode Returns the hash code for this instance. Ereditato da DtsObject.
Metodo pubblico GetType Ereditato da Object.
Metodo pubblico InitializeTask Initializes the properties associated with the task. This method is called by the runtime and is not used in code.
Metodo protetto MemberwiseClone Ereditato da Object.
Metodo pubblico ToString Ereditato da Object.
Metodo pubblico Update *** Member deprecated; see Remarks. ***    This method updates the old package XML with the new package XML if CanUpdate is set to true.
Metodo pubblico Validate Verifies that the component is properly configured.

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Osservazioni

A package consists of one or more tasks. These tasks define units of work that are performed as part of copying and transforming data, communicating with other processes, and performing database management functions.

Inherits from DtsObject and IDTSManagedTask.

Esempi

The following code example is a very simple task implementation for a custom task that inherits from Task.

using System;
using Microsoft.SqlServer.Dts.Runtime;

class MyTask : Task
{
    private int m_value = 123;

    public override DTExecResult Execute(Connections connections,
Variables variables, IDTSEvents events,
IDTSLogging log, int lastExecResult, DtsTransaction txn)
    {
        return m_value;
    }
}
Imports System
Imports Microsoft.SqlServer.Dts.Runtime
 
Class MyTask
    Inherits Task
    Private m_value As Integer =  123 
    Public Overrides DTExecResult Property connections,() As Execute(Connections
    End Property
Variables variables, IDTSEvents events,
IDTSLogging log,int Function txn)() As lastExecResult,DtsTransaction
        Return m_value
End Function
End Class

Protezione dei thread

I membri static (Shared in Visual Basic) pubblici di questo tipo sono affidabili. Non è invece garantita la sicurezza dei membri dell'istanza.

Vedere anche

Riferimento

Spazio dei nomi Microsoft.SqlServer.Dts.Runtime

Gerarchia di ereditarietà

System.Object
  Microsoft.SqlServer.Dts.Runtime.DtsObject
    Microsoft.SqlServer.Dts.Runtime.Task
      Microsoft.DataTransformationServices.Tasks.DTSProcessingTask.ASTaskBase
      Microsoft.SqlServer.Dts.Tasks.BulkInsertTask.BulkInsertTask
      Microsoft.SqlServer.Dts.Tasks.DataProfilingTask.DataProfilingTask
      Microsoft.SqlServer.Dts.Tasks.DMQueryTask.DMQueryTask
      Microsoft.SqlServer.Dts.Tasks.ExecuteProcess.ExecuteProcess
      Microsoft.SqlServer.Dts.Tasks.ExecuteSQLTask.ExecuteSQLTask
      Microsoft.SqlServer.Dts.Tasks.ExpressionTask.ExpressionTask
      Microsoft.SqlServer.Dts.Tasks.FileSystemTask.FileSystemTask
      Microsoft.SqlServer.Dts.Tasks.FtpTask.FtpTask
      Microsoft.SqlServer.Dts.Tasks.MessageQueueTask.MessageQueueTask
      Microsoft.SqlServer.Dts.Tasks.ScriptTask.ScriptTask
      Microsoft.SqlServer.Dts.Tasks.SendMailTask.SendMailTask
      Microsoft.SqlServer.Dts.Tasks.TransferDatabaseTask.TransferDatabaseTask
      Microsoft.SqlServer.Dts.Tasks.TransferErrorMessagesTask.TransferErrorMessagesTask
      Microsoft.SqlServer.Dts.Tasks.TransferJobsTask.TransferJobsTask
      Microsoft.SqlServer.Dts.Tasks.TransferLoginsTask.TransferLoginsTask
      Microsoft.SqlServer.Dts.Tasks.TransferSqlServerObjectsTask.TransferSqlServerObjectsTask
      Microsoft.SqlServer.Dts.Tasks.TransferStoredProceduresTask.TransferStoredProceduresTask
      Microsoft.SqlServer.Dts.Tasks.WebServiceTask.WebServiceTask
      Microsoft.SqlServer.Dts.Tasks.WmiDataReaderTask.WmiDataReaderTask
      Microsoft.SqlServer.Dts.Tasks.WmiEventWatcherTask.WmiEventWatcherTask
      Microsoft.SqlServer.Dts.Tasks.XMLTask.XMLTask